4
Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden
Service Manual
Series F02
HY30-5519-M1/UK
Operation Check
Check of Shaft Seal
The pump has two shaft seals - the inner one sealing
the hydraulic oil in the housing, and the outer one the
transmisson oil when the pump is fitted to a PTO. If
any of the sealrings leak, the oil will come out through
an indication hole.
Indication hole
Note:
A heavy leakage can be caused by a worn-out
pump, whereby high pressure oil will come out into
the housing in such large quantities that the sealring
might be damaged. If there is a steady stream of oil
from the indication hole, the pump is probably dama-
ged and will have to be replaced.
Check that no oil is dripping out of the indication hole,
when the pump is in operation. If there is a leakage
from the sealrings, they must be exchanged, See
chapter ”Exchange of shaft seals”.
Checking the Flow from the Pump
The flow from the pump can be checked by means of
a test instrument comprising a flowmeter and a relief
valve.
Connection of test instrument
When the pump is running at about 800 - 1400 r.p.m.
and is loaded up to 150 - 200 bar, the flow must not
decrease by more than 10%.
Example:
We recommend to test both circuits/ports, as an
example test of port A is described.
An F2-70/35 running at 1200 r.p.m. gives - according
to the flowmeter. - a flow of 82 l/min in port A.
If the pump is loaded, the flow must not decrease by
more than 0,1 x 82 = 8,2 l / min, i.e. the flowmeter
should indicated at least 82 - 8,2 = 73,8 l / min. If the
flow drops below this limit, the pump is worn out and
have to be replaced / repaired.
